<?php
/** Copyright (c) 2010, Sudheera Satyanarayana - http://techchorus.net, 
     Binary Vibes Information Technologies Pvt. Ltd. and contributors
 *  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 *   * Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *
 *   * Redistributions in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *
 *   * Neither the names of Sudheera Satyanarayana nor the names of the project
 *     contributors may be used to endorse or promote products derived from this
 *     software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 * 
 */

class Core_Model_User_Acl_CanAccess
{
    public function __construct($value)
    {
        $this->_userId = $value;
    }

    public function assert(Bare_Acl $acl)
    {
        $value = $this->_userId;
        $access = false;
        $user = $acl->getSubject();

        if (
            !(
                is_array($value) 
                and array_key_exists('user_id', $value) 
                and is_numeric($value['user_id'])
            ) 
        ) {
            return false;
        }

        if ($user->getUserId() == $value['user_id']) {
            $access = true;
        } else if ($acl->isAllowed($user,'administer users')) {
            $access = true;
        } 

	    if ($access) {
            return true;
	    } else {
           return false;
	    }
    }
}

